Lucene .NET IndexWriter锁

Question

My question related to the next code snippet:

  static void Main(string[] args)
{
    Lucene.Net.Store.Directory d = FSDirectory.Open(new DirectoryInfo(/*my index path*/));
    IndexWriter writer = new IndexWriter(d, new WhitespaceAnalyzer());

    //Exiting without closing the indexd writer...
}

In this test, I opened an IndexWriter without closing it - so even after the test exits, the write.lock file still exists in the index directory, so I expected that the next time I open an instance of IndexWriter to that index, a LockObatinFailedException will be thrown. Can someone please explain to me why am I wrong? I mean, does the meaning of the write.lock file is to protect creation of two IndexWriters in the same process only? that doesnt seems the right answer to me...

Answer 1

It looks like there is a bug with that IndexWriter constructor, if you change your code to:

IndexWriter writer = new IndexWriter("Path to index here", new WhitespaceAnalyzer());

You will get the Exception.

The lock file is used to prevent 2 IndexWriter opened on the same index, whether they are in the same process or not. You are right to expect an Exception there.